Water stress - responses of plants to stress, Biology

Water Stress - Responses of Plants to Stress

Water stress in a plant can result from drought, excess salinity in the soil and very low or high temperatures. It has been found that during water stress certain organic compounds such as sucrose and amino acids particularly proline accumulate and thus lower the osmotic potential in the cells. But the metabolic activity of the cell is not much affected.

However, the activity of some enzymes such as nitrate reductase and phenylalanine ammonia lyase decreases while activity of degrading enzymes like α-amylase and ribonucleases increases. It is proposed that the enzymes break down starch and other molecules into their monomeric units which make osmotic potential of the cells more negative.

Posted Date: 1/18/2013 12:16:31 AM | Location : United States







Related Discussions:- Water stress - responses of plants to stress, Assignment Help, Ask Question on Water stress - responses of plants to stress, Get Answer, Expert's Help, Water stress - responses of plants to stress Discussions

Write discussion on Water stress - responses of plants to stress
Your posts are moderated
Related Questions
Explain the term Trans fatty acids? Plant derived fats and oils contain cis-fatty acids. You may recall reading about the cis and trans isomers in the Nutritional Biochemistry

Important Causes of Degradation of Ecosystem The important causes that have lead to the degradation of the ecosystem. Deforestation Overgrazing Agriculture


Determine Teenager mindset and the eating disorders? Self image is an important determinant of weight and figure. Mostly girls under eat as already mentioned earlier, in order

Cloning vector: The DNA molecule originating from the virus, a plasmid, or the cell of a higher organism into which an another DNA fragment of appropriate size can be integrated w

Explain Healthy nutrition There is no doubt that adoption of Healthy nutrition lifestyle and the practice of good nutrition habits would help eliminate many health problems ca

Q. What are the intermediate and the definitive hosts of the plasmodium? In the life-cycle of the plasmodium humans are the intermediate hosts (where asexual reproduction takes

Q. Which is the brain region responsible for the coordination and equilibrium of the body? In the central nervous system the cerebellum is the main controller of the motor equi

Define Vitamins required for underweight - nutritional care? If the diet provides good amounts of fresh fruits and vegetables, vitamin or mineral supplements are usually not re

in natural vegetative propagation which structure gives rise to new individuals?